A flabellum (plural flabella), in Christian liturgical use, is a fan made of metal, leather, silk, parchment or feathers, intended to keep away insects from the consecrated Body and Blood of Christ and from the priest, as well as to show honour. The ceremonial use of such fans dates back to Ancient Egypt, and an example was found in the tomb of Tutankhamun. A flabellum is also a fan-shaped structure on the fifth legs of horseshoe crabs (Xiphosura). History Flabella were in use in both pagan rituals and in the Christian Church from very early days. The Apostolic Constitutions, a work of the fourth century, state (VIII, 12): "Let two of the deacons, on each side of the altar, hold a fan, made up of thin membranes, or of the feathers of the peacock, or of fine cloth, and let them silently drive away the small animals that fly about, that they may not come near to the cups". Flabella were originally used liturgically in the West as well as the East, but they fell into disuse for the Mass in the Latin Church about the fourteenth century. Apart from the foregoing liturgical uses, a flabellum, in the shape of a fan, later of an umbrella or canopy, was used as a mark of honour for bishops and princes. Prior to Vatican II, two fans of this kind were used at the Vatican whenever the pope was carried in state on the sedia gestatoria to or from an altar or audience-chamber. Through the influence of Count Ditalmo di Brozza, the fans formerly used at the Vatican were presented in 1902 to a Mrs. Joseph Drexel of Philadelphia, United States, by Pope Leo XIII; in return, she gave a new pair to the Vatican. The old ones are currently exhibited in the museum of the University of Pennsylvania. The spread is formed of great ostrich plumes tipped with peacock feathers; on the palm (base of the fan) are the arms of the Holy See, worked in heavy gold on a crimson field, the tiara being studded with rubies and emeralds. The new pair of flabella is on display in the Vatican museum. Lisbon Patriarchal Cathedral also holds two flabella and one sedia gestatoria in its museum. It is thought the right of the cardinal patriarchs to use such honour was granted after the efforts of King John V of Portugal that